Table 1.
Expanded stellar population of the Arches cluster
| ID | RA | Dec | mF127M | mF139M | mF153M | mF205W | #Observations | Spectral | Notes |
|---|---|---|---|---|---|---|---|---|---|
| (h m s) | (d m s) | (mag) | (mag) | (mag) | (mag) | (#Epochs) | classification | ||
| F23 | 17 45 51.211 | −28 49 23.84 | 16.38 | 15.27 | 14.21 | 12.19 | 6(6) | O5.5-6 Ia | |
| F39 | 17 45 51.166 | −28 49 36.70 | 16.98 | 15.84 | 14.76 | 12.65 | 1(1) | O5.5-6 Ia | |
| F41 | 17 45 50.429 | −28 49 27.42 | 18.46 | 17.15 | 15.89 | 13.53 | 4(4) | O5 Ia | |
| F44 | 17 45 50.701 | −28 49 25.59 | 17.19 | 16.05 | 14.93 | 12.88 | 7(5) | O5.5-6 Ia | Close to 73 |
| F48 | 17 45 50.623 | −28 49 26.96 | 17.69 | 16.53 | 15.42 | 13.28 | 6(6) | O5.5-6 Ia | |
| F56 | 17 45 50.591 | −28 49 22.19 | 17.00 | 15.92 | 14.91 | 13.03 | 2(2) | O5.5-6 III | Merged with F95 |
| F57 | 17 45 50.768 | −28 49 20.31 | 16.91 | – | – | 13.04 | 2(2) | O5.5-6 III | Merged with F72 |
| F58 | 17 45 49.968 | −28 49 19.60 | 17.83 | 16.57 | 15.37 | 13.05 | 3(3) | O5.5-6 III | |
| F65 | 17 45 50.082 | −28 49 21.53 | 17.58 | 16.42 | 15.32 | 13.16 | 5(5) | O5.5-6 Ia | |
| F72 | 17 45 50.784 | −28 49 20.27 | – | 16.08 | 15.05 | 13.13 | 2(2) | O5.5-6 III | Merged with F57 |
| F73 | 17 45 50.679 | −28 49 25.58 | 17.78 | 16.59 | 15.48 | 13.35 | 11(9) | O6 III | Close to F44 |
| F80 | 17 45 50.589 | −28 49 19.46 | 17.40 | 16.29 | 15.32 | 13.47 | 28(14) | O6-6.5 III | Close to F7 |
| F83 | 17 45 50.061 | −28 49 20.67 | 18.00 | 16.81 | 15.69 | 13.53 | 4(4) | O6-7 III-V | |
| F89 | 17 45 50.955 | −28 49 17.15 | 17.33 | 16.33 | 15.39 | 13.65 | 16(15) | O7-8 V | |
| F94 | 17 45 50.657 | −28 49 28.03 | 18.74 | 17.50 | 16.33 | 14.14 | 4(4) | O6-8 III-V | |
| F95 | 17 45 50.578 | −28 49 22.00 | 17.80 | 16.71 | 15.69 | 13.71 | 2(2) | O5.5-6 III | Merged with F56 |
| F98 | 17 45 51.153 | −28 49 37.06 | 18.08 | 16.93 | 15.87 | 13.75 | 1(1) | O6-6.5 III | |
| F101 | 17 45 50.914 | −28 49 18.37 | 17.55 | 16.53 | 15.58 | 13.78 | 19(16) | O8 V | |
| F102 | 17 45 50.876 | −28 49 28.80 | 18.24 | 17.07 | 15.93 | 13.78 | 6(6) | O5-6 V | |
| F118 | 17 45 50.453 | −28 49 25.97 | 18.66 | 17.44 | 16.28 | 14.08 | 8(6) | O8-9.5 V | |
| F119 | 17 45 50.842 | −28 49 22.75 | 18.18 | 17.09 | 16.06 | 14.06 | 11(10) | O8 V | |
| F121 | 17 45 50.204 | −28 49 19.64 | 18.53 | 17.35 | 16.24 | 14.09 | 9(9) | O9.5 V | |
| F128 | 17 45 51.216 | −28 49 36.53 | 18.51 | 17.37 | 16.28 | 14.18 | 1(1) | O9.5 V | |
| F130 | 17 45 50.605 | −28 49 27.50 | 18.80 | 17.58 | 16.40 | 14.21 | 4(4) | O9.5 V | |
| F131 | 17 45 50.163 | −28 49 27.46 | 19.11 | 17.80 | 16.55 | 14.23 | 9(6) | O6.5 III | Close to F10 & 17 |
| F136 | 17 45 50.077 | −28 49 27.84 | 19.59 | 18.18 | 16.83 | 14.30 | 13(10) | O6-7 V | |
| F139 | 17 45 51.207 | −28 49 23.41 | 18.59 | 17.48 | 16.33 | 14.36 | 6(6) | O8 V | |
| F142 | 17 45 50.689 | −28 49 24.93 | 18.63 | 17.50 | 16.43 | 14.41 | 2(2) | O8 V | Close to F53 |
| F157 | 17 45 50.220 | −28 49 24.18 | 19.11 | 17.89 | 16.71 | 14.55 | 14(14) | O8-9.5 V | |
| F159 | 17 45 50.882 | −28 49 15.69 | 19.63 | 18.49 | 17.32 | 14.57 | 6(6) | O9.5 V | |
| F170 | 17 45 50.704 | −28 49 20.96 | 18.74 | 17.67 | 16.63 | 14.74 | 19(10) | O8-9.5 V | Close to F32, 33 & 38 |
| F173 | 17 45 50.204 | −28 49 20.24 | 19.10 | 17.93 | 16.83 | 14.80 | 5(5) | O9.5 V | |
| F185 | 17 45 50.282 | −28 49 27.56 | 19.65 | 18.40 | 17.18 | 14.95 | 10(7) | O9.5 V | |
| F186 | 17 45 50.001 | −28 49 28.24 | 20.43 | 19.01 | 17.61 | 14.95 | 13(10) | O9.5 V | |
| F188 | 17 45 50.936 | −28 49 21.80 | 19.02 | 17.93 | 16.91 | 14.97 | 3(3) | O9.5 V | |
| F189 | 17 45 50.595 | −28 49 23.52 | 18.91 | 17.79 | 16.69 | 14.77 | 5(5) | O9.5 V |
Notes.We summarise the properties of stars with new or revised spectral classifications. Column 1 indicates the nomenclature for cluster members adopted by Figer et al. (2002), Cols. 2 and 3 the J2000 co-ordinates, Cols. 4–6 the HST WFC3 photometry from Paper I and Col. 7 F205W filter photometry from Figer et al. (2002). Column 8 presents the total number of VLT/SINFONI data-cubes available for individual objects, with the number in parentheses being the number of epochs on which these data were obtained. Column 9 provides a spectral classification while the final column provides additional notes on possible blending or contamination; individual cases are discussed in Sect. 2. F36 is found to be a cool interloper; as with F11, F46, F51 and F99 it is therefore excluded from the table. Finally the nominal classification of the unresolvable blends F56+F95 and F57+72 are given in italics.
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